27 Celebrities You Forgot Made Cameos On 'The Simpsons'

Katy Perry was the only non-animated guest star to appear on the series.
screenshot
On Tuesday, "The Simpsons" creator Matt Groening finally revealed, after 20 years, that the famous cartoon family live in Springfield... Oregon.

It only took 500 episodes, 23 seasons and over 600 celebrity guest appearances for Groening to fill us all in on this news.

Season 1, Episode 7 "The Call of the Simpsons": Albert Brooks as car salesman Cowboy Bob.

Season 2, Episode 3 "Treehouse of Horror": James Earl Jones was featured three times in the original series' Halloween staple as a narrator, Serak the Preparer and a removal man. He has appeared in subsequent "Treehouse of Horror" episodes in seasons 6 and 9 voicing Maggie's alternate universe self.

Season 3, Episode 1 "Stark Raving Dad": Michael Jackson plays Leon Kompowsky who Homer meets in a mental asylum. It turns out he's secretly the pop star. Jackson also performed an original rendition of "Happy Birthday" for Lisa Simpson.

screenshot

4/

Season 3, Episode 4 "Bart the Murderer": Neil Patrick Harris plays a murderous Bart Simpson on a television show.

screenshot

5/

We also enjoyed Sting as himself in Season 3, Episode 13 "Radio Bart." After Bart tricks the town into believing an orphan fell down a well, the singer, along with others, performs his charity single, "We're Sending Our Love Down the Well." The episode was nominated for an Emmy.

screenshot

6/

Season 4, Episode 9 "Mr. Plow": Adam West is known to lend his voice to animated characters as himself or versions of Batman (Mayor West on "Family Guy" and Catman on Nickelodeon's "The Fairly Oddparents"). West was featured first in season four as himself, and later in season 14 (episode 4 "Large Marge," if you're wondering) as the caped crusader.

screenshots

7/

Season 4, Episode 22 "Krusty Gets Kancelled": After Krusty the Clown's show gets the axe, a plethora of stars including Hugh Hefner, Johnny Carson and the Red Hot Chilli Peppers make appearances. Bette Midler guest-starred performing a duet of "Wind Beneath My Wings" with the clown.

Season 7, Episode 4 "Lisa the Vegetarian": Paul McCartney and his wife Linda made appearances as themselves when Lisa ran off to become a vegetarian.

Season 9, Episode 12 "Bart Carny": Jim Varney played carny worker, Cooder when the carnival came to town.

screenshot

13/

Season 10, Episode 10 "Mayored to the Mob": Mark Hamill gets animated for a different 'toon (he played the Joker in Batman the Animated series) as he plays himself donned as his Star Wars' character Luke. The best part was Hamill singing his own rendition of "Luck Be A Lady." ("Luke, Be A Jedi.")